10c-20=10c-9

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Solution for 10c-20=10c-9 equation: 


Simplifying
10c + -20 = 10c + -9

Reorder the terms:
-20 + 10c = 10c + -9

Reorder the terms:
-20 + 10c = -9 + 10c

Add '-10c' to each side of the equation.
-20 + 10c + -10c = -9 + 10c + -10c

Combine like terms: 10c + -10c = 0
-20 + 0 = -9 + 10c + -10c
-20 = -9 + 10c + -10c

Combine like terms: 10c + -10c = 0
-20 = -9 + 0
-20 = -9

Solving
-20 = -9

Couldn't find a variable to solve for.

This equation is invalid, the left and right sides are not equal, therefore there is no solution.

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